If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
(1/2)*(a-7) = 25 // - 25
(1/2)*(a-7)-25 = 0
1/2*(a-7)-25 = 0
1/2*(a-7)-25 = 0
1/2*a-57/2 = 0
1/2*a-57/2 = 0
1/2*a-57/2 = 0 // + 57/2
1/2*a = 57/2 // : 1/2
a = 57/2/1/2
a = 57
a = 57
| p=25k | | -4x+7=2(5-x) | | 0=x^3-2x^2+5x | | 12.4y+5(1.6-2.48y)=8 | | -12.1+-9.03= | | 20x^4-12x^3+4x^2= | | y^2+20y-40=0 | | 14=9+y | | 2x+22=45x | | 12.4y+5x=8 | | 10-6h=-3 | | F(x)=-4.9x^2+22x+2 | | x=0.0016 | | 8c^2-18c-5= | | 11+2b=-4 | | F(x)=-4.9(2)+22x+2 | | 11+2b=-3 | | 7n=-9 | | 4x-25=-19+6x | | 4(x-4.9)=7.6 | | 2t-6=-6 | | 3-3=6x+5x | | 4(3n-2)=(7n+4)+7 | | p=100-4x | | 7(8y-2)= | | 1272.75=1/3x(200.96) | | f(x)=5x^2+10x+6 | | 110=-5(10a-2) | | 7(2x-8)+5=14x-51 | | 30/(2x-3)=6 | | x+12-27+6=177 | | (6x)(5)=150 |